“Internet of Things” (IoT) was a hot topic at the Second World Internet Conference held in Wuzhen, Zhejiang. Experts said at the conference that in five years, there could be 30 to 50 billion IoT devices (設(shè)備) connected to and shaping our lives. Look at the chart below. What will things be like in five years? Let’s take a look!

1.The number of connected devices the number of World population is equal to the number of connected devices per person.

A. plus B. minus

C. multiplied by D. divided by

2. devices have been connected to the IoT by the year of 2020.

A. 500 million B. 12.5 billion

C. 25 billion D. 50 billion

3.From the chart, we can learn that .

A. fewer and fewer people are using connected devices

B. more and more people are using connected devices

C. the number of connected devices was fewer in 2015 than in 2010

D. it is increasing of population that leads to increasing of connected devices

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：初中英語 來源：河北省2017屆九年級(jí)下學(xué)期第3周周測英語試卷 題型：單項(xiàng)填空

They are going to London next month．They are________visiting the Buckingham Palace．

A. looking at

B. looking for

C. looking forward to

D. looking over

查看答案和解析>>

科目：初中英語 來源：四川省峨眉山市2017屆九年級(jí)第二次調(diào)研英語試卷 題型：閱讀理解

Harmful microbes (微生物) like bacteria (細(xì)菌), viruses (病毒) and other germs (病菌) are pathogens (病原體). They may enter your bodies and make you ill. The immune system (免疫系統(tǒng)) is the body’s defence (防衛(wèi)) system that protects you from illness and disease caused by the pathogens.

The immune system is made up of non-specialized defences such as skin, tears and the acidic juice produced by the stomach, keeping you from the pathogens. It also has some highly specialized defences, which are different kinds of immune cells (細(xì)胞), grouped into phagocytes (噬菌細(xì)胞) and lymphocytes (淋巴細(xì)胞). Phagocytes are a type of white blood cell. They are swimming around in your blood stream, always on the lookout for antigens (抗原) —the pathogens that have entered your bodies. Whenever they see one, they will eat it. However, some antigens are hard to find and kill. Then lymphocytes, which are also white blood cells and the main types are B cells, T helper cells and T killer cells, will be the killers of the sneaky antigens. B cells, T helper and T killer cells work together to find and kill these antigens. B cells produce substances, called antibodies, which stick to the antigen. When that happens, it will tell the T helper cells to come over and either: 1. help the B cells kill the antigen, or 2. call the phagocytes or T killer cells to move in for the kill. Once a B cell or a T cell attacks an antigen, they create cells to “remember” it. Those “memory cells” hang out in your blood and if they see the same antigen again, they quickly recognize (識(shí)別) it so your immune system can act faster at killing it.

The immune system is more powerful than you probably imagine. Scientists from the University of Pennsylvania recently took immune cells from three patients with leukemia (白血病), then genetically changed them into “serial killer” cells to attack cancer cells. The study was small but the results were ground-breaking. The modified immune cells increased at least 1,000 times in the body and killed all the cancer cells. Therefore, more “memory cells” were created.

The immune system can be developed. Eating lean protein food (beef, beans) and food rich in vitamins A, C and E (sweet potatoes, carrots)，taking a 30-minute walk every day and reducing your stress levels, will help you achieve it.

1.The immune system can _________.

A. keep you from antibodies. B. protect you against antigens.

C. make your bodies weak and sick. D. help microbes enter your bodies.

2.How are the sneaky antigens found and killed

A. B cells produce antibodies to tell T helper and T killer cells.

B. B cells create “memory cells” to swim around in the blood.

C. Skin, tears, acidic juice and immune cells work together.

D. Phagocytes, B cells, T helper and T killer cells work together.

3.After a B cell or a T cell attacks an antigen, they create _________.

A. phagocytes B. lymphocytes C. memory cells D. serial killer

4.The underlined word “it” in the last paragraph refers to _________.

A. Less antigens can be killed by the immune system

B. The immune system can be changed into the “serial killer”

C. White blood cells act less quickly in the immune system

D. The immune system can be made more powerful

5.This article is mainly about _________.

A. the types of white blood cells B. an introduction to the immune system

C. a research report about human health D. the cause of illness and disease

查看答案和解析>>

科目：初中英語 來源：四川省峨眉山市2017屆九年級(jí)第二次調(diào)研英語試卷 題型：單項(xiàng)填空

﹣Are you going to have a part time job during the summer vacation?

﹣Yes. I think I shouldn’t always _________ my parents since I’ve grown up.

A. fight against B. hear from C. depend on

查看答案和解析>>

科目：初中英語 來源：江蘇省連云港市2017屆九年級(jí)中考模擬（三）英語試卷 題型：短文填空

What do you think of the picture? The picture tells us whatc1.PM2.5. From the picture, we can see that much traffic is the mostl2.reason. Many cities in China suffered from p3.air in 2015. People have to wear masks when going outside. China is trying to d4.with these problems. As students, we can have a greener lifestyle, such as takingp5.transportation, using cleaner energy, etc. I am sure we’ll have a bluer sky sooner.

查看答案和解析>>

科目：初中英語 來源：江蘇省連云港市2017屆九年級(jí)中考模擬（三）英語試卷 題型：單項(xiàng)填空

–President Xi a visit to three countries in Middle East from Jan.19 to 23.

–This was his first visit in 2016.

A. paid B. will pay

C. has paid D. is paying

查看答案和解析>>

科目：初中英語 來源：江蘇省連云港市2017屆九年級(jí)中考模擬（三）英語試卷 題型：單項(xiàng)填空

– Shanghai Disneyland will open in 2016.

– When it opens, it will have castle of any Disneyland.

A. big B. bigger C. the biggest D. the bigger

查看答案和解析>>

科目：初中英語 來源：山東省煙臺(tái)市生學(xué)業(yè)水平模擬考試英語試卷 題型：單項(xiàng)填空

—What did the teacher say to you just now?

—She asked _______.

A. where did I buy the dictionary

B. where I bought the dictionary

C. where do I buy the dictionary

D. where I buy dictionary

查看答案和解析>>

科目：初中英語 來源：山東省淄博市2016-2017學(xué)年七年級(jí)下學(xué)期期中考試英語試卷 題型：任務(wù)型閱讀

Dear Linda,

How are you? My name is Liu Mei. I’m a middle school student. My best friend is Anna. She is an English girl. (A) She often (經(jīng)常) helps me with my English. At school my favorite subject is music. I can sing well. I love my music teacher. She is like a sister to me.

My parents are teachers in a middle school. My father is a math teacher and my mother is a Chinese teacher. I have a brother. (B) 他和我在同一所學(xué)校。He likes math. He thinks it is very interesting.

I get up at six o’clock every morning. I have classes from Monday to Friday. On weekends I usually go to the sports club to play tennis with my friends.

What do you usually do every day? What do you like doing? Please write and tell me about that.

Yours,

Liu Mei

根據(jù)信件內(nèi)容，完成下面的任務(wù)。

1.用正確的單詞完成句子。

There are _______________ people in Liu Mei’s family.

2.將文中劃線句子(A) 翻譯成漢語。

________________________________________________

3.將文中劃線句子(B)翻譯成英語。

________________________________________________

回答下面的問題。

4.Who’s Anna?

__________________________________________________

5.What time does Liu Mei get up in the morning?

_________________________________________________

查看答案和解析>>

同步練習(xí)冊答案